aboutsummaryrefslogtreecommitdiff
path: root/mesalib/src/glsl/link_uniform_initializers.cpp
blob: 54d9bf1f528ddd63a95e39f7b29bf4ef0d681c1f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
/*
 * Copyright © 2012 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#include "main/core.h"
#include "ir.h"
#include "linker.h"
#include "ir_uniform.h"
#include "glsl_symbol_table.h"
#include "program/hash_table.h"

/* These functions are put in a "private" namespace instead of being marked
 * static so that the unit tests can access them.  See
 * http://code.google.com/p/googletest/wiki/AdvancedGuide#Testing_Private_Code
 */
namespace linker {

gl_uniform_storage *
get_storage(gl_uniform_storage *storage, unsigned num_storage,
	    const char *name)
{
   for (unsigned int i = 0; i < num_storage; i++) {
      if (strcmp(name, storage[i].name) == 0)
	 return &storage[i];
   }

   return NULL;
}

void
copy_constant_to_storage(union gl_constant_value *storage,
			 const ir_constant *val,
			 const enum glsl_base_type base_type,
			 const unsigned int elements)
{
   for (unsigned int i = 0; i < elements; i++) {
      switch (base_type) {
      case GLSL_TYPE_UINT:
	 storage[i].u = val->value.u[i];
	 break;
      case GLSL_TYPE_INT:
      case GLSL_TYPE_SAMPLER:
	 storage[i].i = val->value.i[i];
	 break;
      case GLSL_TYPE_FLOAT:
	 storage[i].f = val->value.f[i];
	 break;
      case GLSL_TYPE_BOOL:
	 storage[i].b = int(val->value.b[i]);
	 break;
      case GLSL_TYPE_ARRAY:
      case GLSL_TYPE_STRUCT:
      case GLSL_TYPE_INTERFACE:
      case GLSL_TYPE_VOID:
      case GLSL_TYPE_ERROR:
	 /* All other types should have already been filtered by other
	  * paths in the caller.
	  */
	 assert(!"Should not get here.");
	 break;
      }
   }
}

void
set_uniform_initializer(void *mem_ctx, gl_shader_program *prog,
			const char *name, const glsl_type *type,
			ir_constant *val)
{
   if (type->is_record()) {
      ir_constant *field_constant;

      field_constant = (ir_constant *)val->components.get_head();

      for (unsigned int i = 0; i < type->length; i++) {
	 const glsl_type *field_type = type->fields.structure[i].type;
	 const char *field_name = ralloc_asprintf(mem_ctx, "%s.%s", name,
					    type->fields.structure[i].name);
	 set_uniform_initializer(mem_ctx, prog, field_name,
				 field_type, field_constant);
	 field_constant = (ir_constant *)field_constant->next;
      }
      return;
   } else if (type->is_array() && type->fields.array->is_record()) {
      const glsl_type *const element_type = type->fields.array;

      for (unsigned int i = 0; i < type->length; i++) {
	 const char *element_name = ralloc_asprintf(mem_ctx, "%s[%d]", name, i);

	 set_uniform_initializer(mem_ctx, prog, element_name,
				 element_type, val->array_elements[i]);
      }
      return;
   }

   struct gl_uniform_storage *const storage =
      get_storage(prog->UniformStorage,
		  prog->NumUserUniformStorage,
		  name);
   if (storage == NULL) {
      assert(storage != NULL);
      return;
   }

   if (val->type->is_array()) {
      const enum glsl_base_type base_type =
	 val->array_elements[0]->type->base_type;
      const unsigned int elements = val->array_elements[0]->type->components();
      unsigned int idx = 0;

      assert(val->type->length >= storage->array_elements);
      for (unsigned int i = 0; i < storage->array_elements; i++) {
	 copy_constant_to_storage(& storage->storage[idx],
				  val->array_elements[i],
				  base_type,
				  elements);

	 idx += elements;
      }

      if (base_type == GLSL_TYPE_SAMPLER) {
         for (int sh = 0; sh < MESA_SHADER_TYPES; sh++) {
            gl_shader *shader = prog->_LinkedShaders[sh];

            if (shader && storage->sampler[sh].active) {
               for (unsigned i = 0; i < storage->array_elements; i++) {
                  unsigned index = storage->sampler[sh].index + i;

                  shader->SamplerUnits[index] = storage->storage[i].i;
               }
            }
	 }
      }
   } else {
      copy_constant_to_storage(storage->storage,
			       val,
			       val->type->base_type,
			       val->type->components());

      if (storage->type->is_sampler()) {
         for (int sh = 0; sh < MESA_SHADER_TYPES; sh++) {
            gl_shader *shader = prog->_LinkedShaders[sh];

            if (shader && storage->sampler[sh].active) {
               unsigned index = storage->sampler[sh].index;

               shader->SamplerUnits[index] = storage->storage[0].i;
            }
         }
      }
   }

   storage->initialized = true;
}
}

void
link_set_uniform_initializers(struct gl_shader_program *prog)
{
   void *mem_ctx = NULL;

   for (unsigned int i = 0; i < MESA_SHADER_TYPES; i++) {
      struct gl_shader *shader = prog->_LinkedShaders[i];

      if (shader == NULL)
	 continue;

      foreach_list(node, shader->ir) {
	 ir_variable *const var = ((ir_instruction *) node)->as_variable();

	 if (!var || var->mode != ir_var_uniform || !var->constant_value)
	    continue;

	 if (!mem_ctx)
	    mem_ctx = ralloc_context(NULL);

	 linker::set_uniform_initializer(mem_ctx, prog, var->name,
					 var->type, var->constant_value);
      }
   }

   ralloc_free(mem_ctx);
}